Will Oliver kill Malcolm?

After i watched Arrow's episode ''Unchained" and the promo of the next episode i am wondering if Oliver is really going to kill Malcolm. He thanked Merlyn for his help and then they shaked hands. They both love Thea and maybe Malcolm will agree give up his life for his doughter's but i kind of doubt. Maybe Oliver will tell Malcolm and they will figure another way like faking his death. Oliver loves his sister but i don't know if he is going to sacrifice another life for hers. Maybe he won't and Nyssa won't give him the Laus elixir and Thea will die. Or maybe Laurel will be able to convince her by talking about Sara or even better maybe Sara will talk with her which i think is not very probable.